/Engine/Source/Developer/CollectionManager/Public/ICollectionManager.h
Returns the list of collections with the given name
void GetCollections ( [FName](API\Runtime\Core\UObject\FName) CollectionName, [TArray](API\Runtime\Core\Containers\TArray)< [FCollectionNameType](API\Developer\CollectionManager\FCollectionNameType) > & OutCollections ) const